The present invention relates to a base part for a drug delivery device. Is secured to the patients skin during use, the base part is connected to the cannula portion arranged subcutaneously at least partially. In addition, one or more components, for example the base part is connected to a sensor capable of detecting glucose unit content in the blood of the patient. Fixing means for releasably mounting the base part of the reservoir unit / dosage unit in use (15), when the reservoir unit / dosage unit is attached to the base part, the base part and the base part with a reservoir portion / dosage unit provided to allow fluid to flow between, and means corresponding to the fluid path of the first fluid or a first path from the reservoir portion, the fluid path of the first base is detachable reservoir unit / dosage unit and a (17) means for blocking the fluid flow when it is not attached to (1) component, to open a fluid path (19) when the dosing unit is mounted base part (1). And a (12A, 12C) and an opening base part (1) Kamata, and one or more (2) the lower mounting surface, the shape of the cannula or at least two forms, the sensor part and at least one cannula at least one Subcutaneous two or more units of the (7, 70) extends through the opening, the base part (1) of the cannula during use, placed subcutaneously from the outlet of the first fluid path (22, with the fluid path of a second to allow fluid to flow to the inlet 22a, a 22b), the signal path is provided to the sensor contact part from the reservoir section / unit dose. The base part is characterized in that during use, the fluid path A second fluid connection with the opening end of the cannula disposed subcutaneously.本発明は、薬剤投与装置のためのベース部品に関する。ベース部品は、使用中に患者の皮膚に固定され、少なくとも部分的に皮下に配置されるカニューレ部に接続される。また、ベース部品は、1つまたは複数の成分、例えば患者の血液中のグルコース含有量を検出可能なセンサユニットに接続される。ベース部品は、使用中にリザーバ部/投与部をベース部品に解除可能に取り付ける固定手段(15)と、リザーバ部/投与部がベース部品に取り付けられるとき、リザーバ部/投与部とベース部品との間の流体の流れを可能にする、リザーバ部からの第1の流体経路もしくは第1の流体経路に相当する手段とを備え、第1の流体経路は、取り外
